Dynamic CSS Stylesheets in PHP version

I'd like to be able to programmatically override the stylesheet settings in fck_config.js so that different users would have different groups of styles available to them. Is there a way to do this with PHP? Thanks.

I would like to override: config.EditorAreaCSS, config.StyleNames, and config.StyleValues.

In my application, each user has a unique stylesheet. After they've logged in, I want to set up fckeditor so their unique stylesheet is set to config.EditorAreaCSS. Then, I want to load their individual styles/values into config.StyleNames and config.StyleValues.

It would be pretty easy to do if I could do it in PHP and override these config settings (similar to how ToolbarSet can be specified). I don't really know Javascript, though.